Sterek Smut

Only You

Plot-Stiles gets insecure when girls flirt with Derek at a party, so Derek shows Stiles how much he means to him.

Warnings-Soft sex, mirror sex, marking, biting, handjobs, anal, orgasm denial,sir kink, dom/sub dynamic.

A/N-This chapter is more of a focus on aftercare cause I think it's adorable.

Stiles hated parties, but every time the pack threw one Derek dragged him. Unless Stiles was drunk he was far too awkward to do much more than hide in a corner as he stared at Derek, who currently had a girl grinding on him. Stiles felt his cheeks heat up. He hated when girls got all over Derek, and they always got all over Derek. He knew that Derek was loyal beyond measure but he hated the idea of some girl thinking she had a chance with him. Derek never paid those girls much attention but it was just enough to make Stiles jealous and even worse, make him insecure.
       They got back to the loft and Stiles face planted into the bed.
"Are you alright pup?"Derek asked
"Fine."Stiles huffed
Derek sat at the edge of the bed "Stiles what's wrong?"
"Nothing."Stiles scoffed "Nothing at all!"
Derek climbed over and flipped Stiles onto his back and straddled Stiles's chest so Stiles couldn't move.
"I don't appreciate your attitude."Derek practically snarled
Without warning Stiles started to tear up and Derek's expression immediately softened.
"Pup what's the matter?"Derek asked
"It's just....you had those girls all over you."Stiles mumbled "And sometimes I think you find them more attractive."
"Stiles."Derek smiled "You know that's not true."
"No."Stiles denied "I'm not completely sure I do."
Stiles looked away, his face flushed with embarrassment.
Derek leaned down and kissed Stiles's cheek "Than let me prove it to you."
Derek nipped at Stiles's neck and Stiles let out a soft moan. Derek worked his way down Stiles's neck, and to his collarbone where he nipped and kissed at the bone leaving marks that would eventually become hickeys. He did the same down Stiles's chest, removing Stiles and his own clothes as he worked. He was leaving marks on every inch of skin he could. Stiles squirmed at his touch and let out soft, breathy moans.
"Come here puppy."Derek ordered, moving from the bed to the floor by the mirror.
Stiles slowly walked over and Derek motioned for him to sit on his lap. Stiles obliged and Derek leaned into Stiles's ear.
"You're gonna watch as a fuck all of your insecurities out of you."Derek told "I want you to look at the mirror as I show you how amazing you are. Understood?"
"Yes."Stiles mumbled
"Yes what?"Derek questioned
"Yes sir."Stiles smiled
"Good boy."
Derek adjusted himself and Stiles and slowly slipped into him. Stiles groaned and sank back into Derek's chest. Derek began to thrust upwards and Stiles was almost immediately a moaning mess.
"Look at you."Derek praised "I love seeing you like this, my handsome puppy falling apart over my cock. Look at how gorgeous you look."
Stiles looked in the mirror as he became more and more of a moaning mess.
"No one will ever make me feel as good as you do."Derek assured
Stiles tossed his head back as Derek thrusted harder up into him.
"S-sir I'm close."Stiles warned
"Just hold on a little longer pup."Derek told
Stiles let out a soft whine as Derek's thrust got harder. He felt Derek cum inside of him and then Derek wrapped his hand around Stiles's cock and began pumping his hand.
"Go ahead puppy."Derek smiled "It's your turn."
Stiles came hard covering his chest and Derek's hand in his cum. Stiles breathed heavily, slumping back against Derek.
"Good boy."Derek praised
Derek slowly pulled out of Stiles and picked him up. He laid him on the bed while he cleaned up the floor.
"Come on pup."Derek called "Let's get you cleaned up."
Stiles gives a soft "okay" in response,before dragging himself off the bed and into the bathroom. He hisses as the warm cloth makes contact with his sensitive skin. Derek can't help but chuckle. No matter if Stiles cums once or a hundred times, no matter how gentle or rough Derek is with him, he's always so sensitive afterwards. Derek cleans Stiles's up as gently as he can, making note of every mark left on Stiles's pale skin and then cleans up himself. He helps Stiles get into his boxers and pajama pants and Stiles gets his own shirt on as Derek dresses himself. The two climb into bed and Stiles instantly curls up against Derek, nuzzling his head into Derek's chest.
"Do you feel better?"Derek asked
"Yeah."Stiles says, his voice barely audible
Derek rubs Stiles's back and plants a kiss on the top of his head.
"You're special."Derek told "No one is gonna replace you I promise."
"I'm such an idiot."Stiles mumbled
"You are."Derek teased "But you're my idiot."
"Are you sure you haven't thought about replacing me?"Stiles questioned
"Stiles."Derek scoffs "What kind of a question is that."
"Well there has to have been someone you wanted more than me."Stiles babbled "Someone who's more attractive or whatever."
"Pup look at me."Derek ordered
Stiles slowly looked up at Derek.
"It's you."Derek assured "Only you."

A/N-Sorry for the short chapter, kinda hitting some writers block. Part 2 of "The Bet" is coming I promise. Requests are open so send them in if you have them :)